kernel.git/arch/s390/kernel/nospec-sysfs.c, branch linux-5.18.y

s390: introduce nospec_uses_trampoline()

2021-10-26T13:21:29Z

and replace all of the "__is_defined(CC_USING_EXPOLINE) && !nospec_disable" occurrences. Signed-off-by: Sven Schnelle Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/facilities: move stfl information from lowcore to global data

2021-06-07T15:06:58Z

With gcc-11, there are a lot of warnings because the facility functions are accessing lowcore through a null pointer. Fix this by moving the facility arrays away from lowcore. Signed-off-by: Sven Schnelle Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390: Convert IS_ENABLED uses to __is_defined

2019-04-11T11:36:53Z

IS_ENABLED should be reserved for CONFIG_ uses so convert the uses of IS_ENABLED with a #define to __is_defined. Signed-off-by: Joe Perches Signed-off-by: Martin Schwidefsky

s390: detect etoken facility

2018-07-18T06:32:17Z

Detect and report the etoken facility. With spectre_v2=auto or CONFIG_EXPOLINE_AUTO=y automatically disable expolines and use the full branch prediction mode for the kernel. Signed-off-by: Martin Schwidefsky

s390: move spectre sysfs attribute code

2018-05-07T19:12:41Z

The nospec-branch.c file is compiled without the gcc options to generate expoline thunks. The return branch of the sysfs show functions cpu_show_spectre_v1 and cpu_show_spectre_v2 is an indirect branch as well. These need to be compiled with expolines. Move the sysfs functions for spectre reporting to a separate file and loose an '.' for one of the messages. Cc: stable@vger.kernel.org # 4.16 Fixes: d424986f1d ("s390: add sysfs attributes for spectre") Signed-off-by: Martin Schwidefsky